Robot vacuum cleaner



FIG. 1. is a perspective view of the robot vacuum cleaner.

FIG. 2 is a rear view thereof.

FIG. 3 is a front view thereof.

FIG. 4 is a right side view thereof.

FIG. 5 is a left side view thereof.

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The ornamental design for a robot vacuum cleaner, as shown anddescribed.